I have implemented a Sallen-Key high-pass filter using the op-amp in the AD8231. The high-pass filter response is there but there is also a low-pass response around 100kHz.
Is this due to the frequency response of the op-amp itself or can it be increased?
Also, what is the part number for this op-amp? There is no reference to a specific part number for it in the data sheet for the AD8231.